import { z } from "zod";

export const THINKING_LEVELS = ["off", "minimal", "low", "medium", "high", "xhigh", "max"] as const;
export type AgentThinkingLevel = (typeof THINKING_LEVELS)[number];

/**
 * 设置页 → Agent 运行参数。apiKey 为调用方从 secret store 解密后的明文,
 * 只在请求时经 provider auth.resolve 交给 SDK,不进入事件、日志、错误信息。
 */
export const AgentSettingsSchema = z.object({
  provider: z.enum(["anthropic", "openai-compatible"]),
  /** Anthropic 写不带 /v1 的根地址;OpenAI 兼容写带 /v1 的地址 */
  baseUrl: z.string().url().optional(),
  apiKey: z.string().min(1),
  model: z.string().min(1),
  thinkingLevel: z.enum(THINKING_LEVELS).default("off"),
  /** 上下文预算 = 模型 contextWindow(可以比上游真实窗口小) */
  contextBudgetTokens: z.number().int().min(1024).default(128_000),
  /** 单次回复最大输出 token */
  maxOutputTokens: z.number().int().min(256).default(8192),
  compaction: z
    .object({
      mode: z.enum(["threshold", "manual"]),
      /** 上下文占用达到预算的该比例时自动压缩(0.5~0.95) */
      threshold: z.number().min(0.5).max(0.95).default(0.8),
    })
    .default({ mode: "threshold", threshold: 0.8 }),
  /** v0.1 未实现子代理;false 时忽略,true 也只记录(由 agent.delegate 能力后续实现) */
  subagentsEnabled: z.boolean().default(false),
  maxToolCalls: z.number().int().min(1).default(40),
  maxDurationMs: z
    .number()
    .int()
    .min(1000)
    .default(15 * 60_000),
  costBudget: z
    .object({
      maxTotalTokens: z.number().int().positive().optional(),
      maxCostUsd: z.number().positive().optional(),
    })
    .optional(),
  /** 单次请求超时 */
  requestTimeoutMs: z.number().int().positive().default(120_000),
  maxRetries: z.number().int().min(0).max(10).default(2),
});
export type AgentSettings = z.input<typeof AgentSettingsSchema>;
export type ResolvedAgentSettings = z.output<typeof AgentSettingsSchema>;

export function resolveAgentSettings(settings: AgentSettings): ResolvedAgentSettings {
  return AgentSettingsSchema.parse(settings);
}

/** 用于日志/展示:去掉 apiKey */
export function describeSettings(settings: ResolvedAgentSettings): Omit<ResolvedAgentSettings, "apiKey"> & {
  apiKey: "[REDACTED]";
} {
  return { ...settings, apiKey: "[REDACTED]" };
}